Math, asked by Anonymous, 18 days ago

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Solve the following pair of linear equation by the substiting method:
(ii) 3x+4y=10 and 2x-2y=2​

Answers

Answered by IIMissTwinkleStarII
74

Given:-

  • (ii) 3x+4y=10 and 2x-2y=2

Solution:-

3x+4y=10 …………..(1)

2x−2y=2 (or) x−y=1 …………(2)

  • (1) ⇒(3x+4y=10)1

  • (2) ⇒(x−y=1)3

                     _____________________

                                3x+4y=10

                                3x−3y=3

                      _____________________

                                    7y=7

∴y=1

Put y=1 in (1) we get 3x+4×1=10

3x=10−4=6

∴x=36=2

Hence x=2,y=1.

Answered by crankybirds30
5

Answer:

By substitution method, 3 x + 4 y = 1 0 & 2 x − 2 y = 2 ⇒ 2 (x − y) = 2 ⇒ x − y = 1 ___ (2)

∴ x = y + 1 → (1). Substituting in equation (2).

∴ 3 x + 4 y = 1 0 ⇒ 3 (y + 1) + 4 y

= 1 0 ⇒ 3 y + 3 + 4 y

= 1 0 ⇒ 7 y = 7

⇒ y = 1

∴ x = 1 + 1

= 2 ∴

x = 2, y = 1

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